James h



1. H.' HASTA/IAN.

ELECTROTHERAPEUTIC APPARATUS.

APPLICATION F'ILED APR. 23. |919.

l 3 l 7,277. Patented Sept. 30, 1919.

f e' g3 Ti -Li y Ii 'z' fA/VfA/wk dit JAMES H. EASTMAN, 0F DETROIT, MICHIGAN.

ELECTROTHERAPEUTIC APPARATUS.

Specification of Letters Patent.

Patented Sept. 30, 1919.

Application led April 23, 1919. Serial No. 292,054.

To all whom t may concern:

Beit known that T, JAMES H. EASTMAN, a citizen of the United States, residin at Detroit, in the county of Wayne and tate of Michigan, have invented certain new and useful improvements in Electrotherapeutic Apparatus, of which the following is a specification.

This invention relates to electrotherapeutic apparatus, and has for its object a yspecial form of electrode holder capable if quick and cheap assembly. The electrode holder is so constructed that easy access may be had to the metal socket.

This electrotherapeutic apparatus is designed more particularly to have a vacuum or other electrode. Tn apparatus of this character it is customary to yuse a fiber or hard rubber handle into which the electrode is received and by which the same is handled. This handle is now generally utilized to ca the induction coil which supplies the hig voltage which is necessary for apparatus of this character. it has been the general plan heretofore to utilize a handle which has a screw cap on the cable end. This has made it very diiicult to get to the sleeve-like socket for the electrode in case this was necessary. It has also been proposed .heretofore to have screw caps at both ends of the holder but not a screw cap carrying an electrode socket. Nor is an ordinary screw cap of such character as to be a'dapted to carry a socket.

Figure l shows a side elevation and cable end elevation of the electrode holder with the vacuum electrode in place.

Fig. 2 is a fragmentary longitudinal section of the same.

'Fig. 3 is a diagrammatic view showing the wiring.

Fig. t is an end elevation of the removable nose piece for the holder.

Fig. 5 is an elevation of the spring electrode socket. y

Fig. 6 is an elevation showing how the induction coil is connected with the cable.

a designates a hard rubber or fiber handle which comprises a barrel Iand a removable nose piece Z7 in the form of a hollow frustoconical member having a threaded neck c adapted to screw into the threads of the barrel a. The back of this nose piece has -a countersunk hexagonal portion a? adapted to receive the hexagonal end e of the spring split sleeve f which acts as' the electrodo socket. The electrode is designated g and comprises a sealed vacuum tube with an enlarged head and a metallic plug end The induction coil comprises a primary winding l1., the two leads of which pass through the cable i, upon which the holder a is carried, to a source of current and the Vibrator and condenser (nlot shown). The secndary circuit designated y' has a great man more turns than the primary circuit and as one terminal coupled up with the primary and the other terminal connected with the end of the brass rod c. The induction coil is contained in a fiber case Z with only the terminal end of the rod protruding as shown in Fig. 6.

The contents of the handle and the parts of the handle may be very readily assembled by this arrangement. The induction coil is connected up with the end of the cable and inclosed in a fiber case Z so that it becomes a permanent fixture on the end of the cable unless the case needs to be torn oil for repair of the coil. The cable c' is drawn through the small opening m in the rear end of the barrel a until the induction coil strikes the end of the-barrel. The electrode socket sleeve f is simply shoved into the nose piece b from the inner end with the hexagon head e seating in the hexagon countersunk portion d. The nose piece b is then simply screwed in place. Screwing the nose piece tightly down forces the head of the socket sleeve f tightly .against the terminal of the secondary circuit so as to insure a good electrical connection. Hence not only does the screwing of the nose piece into the barrel secure the ordinary function of runiting these two but it also serves to screw the two contacts tightly together. en it is necessary to get at the socket, all that has to be done is to unscrew the no-se piece, remove it and poke the socket out the inner end of the nose piece.

What T claim is:

l. An electrode handle for the purpose specified, having in combination, a barrel having its outer end open and arranged to receive and hold a nose piece, a terminal supported in said barrel and having a free end, a nose piece fitting in the open outer end of said barrel and provided with an opening therethrough to detachably hold an electrode, and a metallic electrode socket removably fitting into the inner end of the opening throughthe nose piece but held from being drawn through such openmg, whereby when the socket is tted into the nose piece and the nose piece secured in the end of the barrel the socket is forced against free end of the terminal to make an electrical connection. n

2. An electrode handle for the purpose specified, having in combination, a barrel` having its outer end open and screw-thread having a free end, a nose piece screwing into the outer end of the barrel and` having an axial opening therethrou h adapted to detachably hold an electr y ed, a terminal supported in said barrel ande', land a metallic electrode socket removably ittin' into .the

inner end of the openingthroug `the nose piece but abuttingsaid noee' ieee so as ,to

vavoid being drawnthrough# enosepiece,

whereby, when thesocketis i placed.y inv the nose piece and the nose piece screwed into" the barrel 'the socket is forced into contact with the free'end of said terminal to ymake an electrical connection.

of the nose piece andl making firm contact with the induction coil contact when the nose piece is screwed into the end of the barrel. "f 'f 5 An electrode holder-` for the purpose Specified', comprising a barrel provided with y an .internally threaded end, a nose piece.'

' providedwithfan inner externally threaded end 'adapted to screw into the end ofr the to, -t into the polygonal countersunk portion alsv ' barrel andalsopI-.ovided witha longitudinal e. An electrode holder ref-the purpose a member contained` therein having at its outer end a terminal, a nose piece adapted to fit into the outer end of theterminal and be secured thereto and .'provided'with a longitudinal opening vthrough" the said specilied, having in combination, a barrel,` v

- into the countersunk portion of the nose- .piece y y' f 6.'An electrode holder` for thepurposev speciied," comprising a barrel vhaving a` f openingope'ning out at its inner end into 'a counterslmk lportion, and an electrode socket inthe form of atube having an enlarged head at its inner end adapted to t into the nosepiecel from the inner end thereof and having an enlarged head adapted to seat sealed inner end provided with a cable openy nose piece having at` its inner 'end a Vpolyg'- onal countersunk portion, Vand a `tubular electrode socket adapted to fit into the longitudinal opening and provided with a polyg countersunk ortion of theffnose" thellsaid head beingadapted tomakevcntact..

with the terminal-when the-'nose piecei s secured into `the end 'of the-barrel. f i 4. An electrode holder for the* urpose specified, 'comprising a barrel' provi ed with ing, an induction coil secured to the end of the ycablfeand` drawn inplace -by drawin thecfable throughy the cableopening, sai coil :arryin onal head. adapted to it into th'e'vpolygonal aterminal on its outer end and a nose piece rovided with an electrode.

posite 'open end yoi the barrel, to .force the Vminal. v l

jsocket and detac ably securable inthe op- 

